Overhead Line Protection Switch Intelligent Controller
Key attributes
| Brand | Rw Energy |
| Model NO. | Overhead Line Protection Switch Intelligent Controller |
| Rated voltage | 230V ±20% |
| Rated frequency | 50/60Hz |
| Electric energy consumption | ≤5W |
| Series | RWK-LC |
Description
Description
RWK-LC overhead line protection switch intelligent controller is medium voltage overhead line grid monitoring unit, it can be equipped with RCW(RVB) type vacuum circuit breaker for achieve of automatic monitoring, fault analysis and event records.
Its given to us a safety power grid for cutting line fault and automatic recovery operation and power automation.
RWK-LC series is suitable for up to 35kV outdoor switchgear using, include: vacuum circuit breakers, oil circuit breakers and gas circuit breakers. RWK-LC intelligent controller is gathering with line protection, control, measurement and monitoring of voltage and current signals integrated automation and control devices outdoors.
RWK is an automatic management unit for single way/multi ways/ring network/two power sourcing, provided with all voltage and current signals and all functions. RWK-LC column switch intelligent controller supports: Wireless (GSM/GPRS/CDMA), Ethernet mode, WIFI, optical fiber, power line carrier, RS232/485, RJ45 and other forms of communication, and can access other station premises equipment (such as TTU, FTU, DTU, etc.).
Main function introduction
1. Protection relay functions:
1) 49 Thermal Overload,
2) 50 Three-section of Overcurrent (Ph.OC) ,
3) 50G/N/SEF Sensitive Earth Fault (SEF),
4) 27/59 Under/Over Voltage (Ph.OV/Ph.UV),
5) 51C Cold load pickup (Cold load).
2. Supervision functions:
1) 60CTS CT Supervision,
2) 60VTS VT Supervision,
3. Control functions:
1) 86 Lockout,
2) 79 Auto reclose,.
3) circuit-breaker control,
4. Monitoring Functions:
1) Primary currents for Phases and Zero sequence current,
2) Primary PT Voltage,
3) Frequency,
4) Binary Input/Output status,
5) Trip circuit healthy/failure,
6) Time and date,
7) Fault records,
8) Event records.
5. Data Storage functions:
1) Event Records,
2) Fault Records，
3) Measurands.
Technology parameters
Device structure
About customization
The following optional functions are available: Power supply rated at 110V/60Hz , Upgrade SMS Function. Upgrade RS485/RS232 Communication interface Function
For detailed customization, please contact the salesman.
Q: What does the line protection switch controller do?
A: It is mainly used to protect the line security. When the line is overloaded, short circuit and other abnormal conditions, the line protection switch controller can quickly detect these problems, and then automatically cut off the circuit, to prevent the line from being damaged by too much current, to avoid causing fire and other dangerous situations. Q: How does it detect a line anomaly?
A: It has a sophisticated current detection device inside. When the current in the line exceeds the set safe value, whether it is due to overload caused by too many appliances or short circuit caused by line fault, the detection device can sense the change in the current and trigger the controller action.
Q: Is the line protection switch controller durable?
A: Generally speaking, if it is a qualified product, it is more durable. The electronic components used are strictly screened, and the housing has good protection and can adapt to different environmental conditions, but it is also checked and maintained regularly to ensure that it works properly.
Solutions for Recloser Controllers
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Distribution automation systems solutionsWhat are the difficulties in overhead line operation and maintenance?Difficulty one:Overhead lines of distribution network have wide coverage,complicatedterrain,many radiation branches and distributed power supply,resultingin "many line faults and difficulty in fault troubleshooting".Difficulty Two:Manual troubleshooting is time-consuming and laborious.Meanwhile,therunning current,voltage and switching state of the line cannot be graspedin real time,because of the lack of intelligent technical m -
Remote OM Technical Solution for South Africa Distribution Lines - RWZ-1000 Cloud-Based MonitoringTechnical Framework for Digitally Reimagining Power Grid OM in South AfricaShifting from "post-fault repair" to "predictive maintenance," reshaping the operation and maintenance processes of the distribution network through digital means.Applications: Unmanned substations, cross-regional long-distance transmission lines, and high-risk operational zones.Product Portfolio: RWZ-1000 intelligent monitoring system and RW8000 cloud management platform.Standards: IEC 60870-5-104, IEEE 1547, and NRS 048
Reference Projects for Recloser Controllers
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RW Energy Multi Country SMS Based Auto Recloser Controller Case StudyBreaking the communication bottlenecks in remote areas worldwide, this solution takes SMS communication as its core innovation and develops recloser controllers adaptable to multiple countries and diverse climates. Free from reliance on 4G networks, it enables rapid fault early warning and remote operation & maintenance management, helping various regions resolve distribution network operation challenges in remote areas and inject intelligent momentum into global rural power grid upgrading.0 -
RW Energy Xinjiang Bazhou Large-scale Data Center 6 kV Industrial Grid Intelligent Power Distribution Upgrade Case StudyFocusing on the high-reliability power supply demands of data centers, this project upgrades the 6kV industrial intelligent power distribution system. It enhances anti-sandstorm and wide-temperature environmental adaptability, integrates rapid protection and remote intelligent operation and maintenance technologies, stably supports high-density computing loads, and empowers the intelligent transformation of power grids in western computing hubs.01 Project Overview1.1Project BackgroundBayingolin -
RW Energy Colombia PV Plant 35 kV Recloser Controller Project Case StudyFacing the frequency fluctuation and grid connection challenges of Colombia’s low-inertia photovoltaic power grid, this solution leverages customized recloser control and optimized frequency protection technologies to precisely adapt to the local 60Hz grid standard. It effectively addresses grid fluctuation issues under complex grid connection conditions, delivering a highly reliable and strong anti-interference grid protection solution for photovoltaic power plants and ensuring their stab -
420 Units of 11 kV Automatic Reclosers for Dhaka Grid Upgrade01 General Overview: Dhaka 11 kV Distribution Grid Upgrade1.1 Project BackgroundBangladesh is currently undergoing a period of rapid economic and industrial development, and the growing demand for electricity has placed immense pressure on the local distribution networks. However, the country's existing 11 kV backbone distribution lines are facing severe equipment aging issues. The original switchgear suffers from serious mechanical wear, resulting in not only high failure rates but also sluggis
Documentation Resource Library Recloser Controllers
Certifications Recloser Controllers
FAQ for Recloser Controllers
NOTE: In the "GSM" menu, it need be set the first phone number, and the limit of the phone number(ADMIN/USER/OFF)①.The default phone number is 13 bits, For example+86 1385758963，if the number is less than 13 bits, the remaining number of digits are replaced by A.
STEP1: config on the Controller
- Set the number in the controller, press [ENTER] key to "EDIT" menu;
- Press [ENTER] key and then press [→] key to "GSM" menu;
- Press [ENTER] key to set the number and limit, first you need to change the number to 8613857589636 (please ignore the symbol "+", and the remaining number of digits are replaced by A ), then change the limit to "Admin", After this, press [ENTER] key and entry password "0099" to save.
STEP2:Operation on the Phone
- Open the APP, the password is admin123 (the users can change the password in the APP );
- When enter the APP, click "Add" to set the value of the controller;
- Then click "Submit" to save;
- Find "Line1" and click "Operate" to operate the device;
- Click "Refresh" and wait for the update message;
- Find "Power" menu, click "Refresh" and wait for the update message.
Three-Section Overcurrent Protection is a coordinated protection scheme widely used in power systems to detect and isolate faults (e.g., short circuits) while ensuring selective tripping. It consists of three stages with distinct operating characteristics based on current magnitude and time delay:
- Instantaneous Overcurrent Protection (Section I)
Function: Responds immediately to severe overcurrents exceeding a high-set threshold (e.g., 5–10 times the rated current).
Purpose: Rapidly clears close-in faults (near the protection device) to prevent equipment damage.
Key Feature: No intentional time delay (operates in milliseconds).
- Time-Delayed Overcurrent Protection (Section II)
Function: Triggers after a predefined short delay (e.g., 0.1–0.5 seconds) for moderate overcurrents (e.g., 2–5 times the rated current).
Purpose: Handles faults farther from the protection device, allowing downstream breakers to clear localized faults first (selectivity).
Coordination: Employs a time-graded scheme—higher fault currents (closer faults) trip faster, while lower currents (remote faults) trip slower.
- Backup Overcurrent Protection (Section III)
Function: Activates after a longer time delay (e.g., several seconds) for low-magnitude overcurrents (e.g., 1.2–2 times the rated current).
Purpose: Serves as a backup for primary protection (Sections I/II) and addresses overloads or persistent faults.
Characteristic: May use an inverse-time curve (trip time decreases as current increases).
Coordination Principle
The three sections work hierarchically:
Section I clears severe faults instantly.
Section II handles moderate faults with short delays, prioritizing system selectivity.
Section III provides backup protection, ensuring reliability if upstream protections fail.
This layered approach minimizes outage scope, balances speed and selectivity, and enhances grid stability.
By increasing the magnification of SEF sampling, we update the program to ensure its sampling accuracy meets the requirements within the range of 0.8-1 amps.
